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1// SPDX-License-Identifier: GPL-2.0+2/*3 * Copyright (C) 2020 Lubomir Rintel <lkundrak@v3.sk>4 */5 6#include <linux/delay.h>7#include <linux/io.h>8#include <linux/mod_devicetable.h>9#include <linux/module.h>10#include <linux/phy/phy.h>11#include <linux/platform_device.h>12 13#define HSIC_CTRL 0x0814#define HSIC_ENABLE BIT(7)15#define PLL_BYPASS BIT(4)16 17static int mmp3_hsic_phy_init(struct phy *phy)18{19 void __iomem *base = (void __iomem *)phy_get_drvdata(phy);20 u32 hsic_ctrl;21 22 hsic_ctrl = readl_relaxed(base + HSIC_CTRL);23 hsic_ctrl |= HSIC_ENABLE;24 hsic_ctrl |= PLL_BYPASS;25 writel_relaxed(hsic_ctrl, base + HSIC_CTRL);26 27 return 0;28}29 30static const struct phy_ops mmp3_hsic_phy_ops = {31 .init = mmp3_hsic_phy_init,32 .owner = THIS_MODULE,33};34 35static const struct of_device_id mmp3_hsic_phy_of_match[] = {36 { .compatible = "marvell,mmp3-hsic-phy", },37 { },38};39MODULE_DEVICE_TABLE(of, mmp3_hsic_phy_of_match);40 41static int mmp3_hsic_phy_probe(struct platform_device *pdev)42{43 struct device *dev = &pdev->dev;44 struct phy_provider *provider;45 void __iomem *base;46 struct phy *phy;47 48 base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);49 if (IS_ERR(base))50 return PTR_ERR(base);51 52 phy = devm_phy_create(dev, NULL, &mmp3_hsic_phy_ops);53 if (IS_ERR(phy)) {54 dev_err(dev, "failed to create PHY\n");55 return PTR_ERR(phy);56 }57 58 phy_set_drvdata(phy, (void *)base);59 provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);60 if (IS_ERR(provider)) {61 dev_err(dev, "failed to register PHY provider\n");62 return PTR_ERR(provider);63 }64 65 return 0;66}67 68static struct platform_driver mmp3_hsic_phy_driver = {69 .probe = mmp3_hsic_phy_probe,70 .driver = {71 .name = "mmp3-hsic-phy",72 .of_match_table = mmp3_hsic_phy_of_match,73 },74};75module_platform_driver(mmp3_hsic_phy_driver);76 77MODULE_AUTHOR("Lubomir Rintel <lkundrak@v3.sk>");78MODULE_DESCRIPTION("Marvell MMP3 USB HSIC PHY Driver");79MODULE_LICENSE("GPL");80